Pump



K. B. SMITH.

PUMP.

APPLICATION FILED MAR.6,1917.

1 384 9 Patented July 19, 1921.

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STATESPATENT QEMQE.

KARL ID. SMITH, OF BATTLE GREEK, MICHIGAN, ASSIGNOR TO UNION STEAM, PUMP COMPANY, OF BATTLE CREEK, MICHIGA PUMP.

Application filed March 6,

To all whom it may concern.

' Be it known that I, KARL D. SMITH, a citizen of the United States, residing at Battle Creek, county of Calhoun, State of Michigan, have invented certain new and useful Improvements in Pumps, of which the follmving is a specification.

This invention relates to improvements in pumps.

My improvements are especially designed by me for embodiment in dry system pumps, that is, pumps for handling air only, and I have illustrated the same as I have embodied them for such purpose. My improved pump is adapted for either pressure or vacuum systems.

The main objects of my invention are:

First, to provide an improved pump in which the passages and ports, valve seats and valve chambers, are easilyformed and readily accessible.

Second, to provide an improved pump in which the valves are in the form of flat annular steel disks with slight lift or movement, making it possible. to operate the machine at high speed without noticeable noise, and at the same time, one having a large free portage.

Third, to provide an .fimproved pump which retains its eiiiciency when operated at high speed.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure I is an elevation of a pump embodying the features of my invention, a portion of the cylinder wall being broken away.

Fig. II is an enlarged detail section, taken on a line corresponding to line 2-2 of Fig. I.

Fig. III is a plan view of the inner head member.

Fig. IV is a plan view of the outer head member. I

In the drawing, similar reference charac ters refer to similar parts throughout the Specification of Letters Patent.

Patented July is, 19231. 1917; Serial No. 152,810..

several views, and the sectional view is taken looking in the direction of the little arrows at the ends of the section line.

Referring to the drawings, the embodiment illustrated is a single action pump comprising a cylinder-1, and reciprocating piston 2 provided with a connecting rod 3. Means for driving the crank shaft 4 are not shown, as they form no part of my present invention, and suitable means will be readily understood.

The cylinder head comprises superimposed members 5, 6 and 7. The inner member is preferably in the form of a flat plate and is provided with an inlet passage 8 delivering to an annularcentrally disposed inlet chamber 9. In the upper face of the head member 5 is a recess an annular inlet valve seat ll, there being 10 provided with a central depression 12 within .this valve seat.

an annular inlet valve chamber; the super imposed head member having a depending stem 13 projecting into the depression 12. This inlet valve chamber is connected to the inlet chamber 9by a plurality ofports 14 disposed in an annular series and'opening into the valve seat 11, as clearly shown in Fig. III. The inlet valve chamber is connected with the cylinder by an annular seriesof ports 15. The'superimpos'ed head The superimposed head member 6 coacts with the head member 5 in PIOVlCllIlg member 6 is provided with a discharge valve chamberlti having adischarge passage 17 and an annular valve seat '18 into which an annular series ofdischarge ports 19 open. The discharge ports also communicate with the inlet valve chamber.

For convenience in forming and assembling the parts the head member 6 has an opening 20 in its top closed by the cap or outer member 21 which is threaded into the member 6.

Annular disk-like inlet and discharge valves 22 and 23, respectively, are arranged on the inlet and discharge valve seats. To insure the prompt seating of the inlet valve 22 certain of the discharge ports'19 are counter-bored, as at 24, to receive the seating springs 25. The outer member 21 is provided with I a stem-like projection 26 whichv depends into a recess 27 in the mem her 6 so that it constitutes a guide stem for the discharge valve; A. seating spring 28 is arranged on this stern. The head members Iii) are secured together and to the cylinder by the screw bolts 29, the head members being provided with alined openings adapted to receive these bolts. By thus forming the head members, ports and passages may be.

out impairing the efiiciency of the pump,

whichjnot infrequently occurs in pumps of this character owing to the valve fluttering or failing to close properly at high speeds.

When it is desired to use the pump as a vacuum pumpv the passage 8 is connected with the tank to be exhausted. 'When it is desired to use it as a pressure pump the con nection is made with the passage 17.

I have illustrated and described my improvements in an embodiment which I have found very satisfactory l have not attempted .to illustrate or describe certain modifications 1n structural details which I contemplate, and which might be desirable under certain circumstances, as I believe the disclosure madefwill enable those skilled in the art to which my invention relates to embody or adapt the same as conditionsmay annular discharge valve seat and a plurality dictate.

The broad claims presented in this appli-:

cation have been transferred to the-applicants :copending application, Serial No. 49,274, filed September .7, 1915.

Having thus described my invention, what .I claim, as newand desire to secure by Letters Patent, is t 1. Ina structure or the class described,

the combination with a cylinder, of a head therefor comprising a pair of superimposed head members, the inner head member bemg prOY1ClQCl. W1th@I1 mletpassage, an an- .seats, a cap for said spring for said inlet nular inlet chamber, an inlet valve chamber in its outer face provided with an annular valve seat, a plurality of inlet ports opening into said valve seat, and a plurality of cylinder ports opening to saidinlet valve 'chamber, the superimposed head member constituting the top of said inlet valve chamber and being provided with a stem disposed centrallyofsaid inlet valve seat and With a discharge valve chamber and discharge passage therefor and having an annular discharge valve seat and a plurality oi discharge ports opening into said inlet valve chamber and said discharge valve seat, annular disk-like valves disposed on said 7 superimposed head member provided with a stem disposed centrally of said discharge valve seat, a coiled spring disposed on said stem on said cap to seat said discharge valve, and a seating valve.

'2. In a structure of the class described, the

combination wlth a cylinder, of a head therefor comprising a pair of superimposed head members, the inner head member having an inlet valve chamber in its outer face provided with an annular valve seat, a plurality of inlet portsopening into said valve seat, and a plurality of cylinder ports opening into-said inlet valve chamber, the superimposed head member constituting thej-top of said inlet. valve chamber and provided witha discharge valve chamber having an of discharge portsi openinginto said inlet valve chamber and said discharge valve seat,

and. annular disk-like valves disposed on said seats.

witness whereof, I have hereunto set -my hand andsealinthe presenceof two 

